Subject: Re: [PATCH] cxl: Fix build failure due to -Wunused-variable behaviour change

From: Michael Ellerman <[email-masked]>
Date: Thu, 26 Nov 2015 10:41:53 +1100

On Wed, 2015-11-25 at 17:16 +0100, Torsten Duwe wrote:
> On Tue, Sep 15, 2015 at 03:48:34PM +1000, Ian Munsie wrote:
> > --- a/drivers/misc/cxl/Makefile
> > +++ b/drivers/misc/cxl/Makefile
> > @@ -1,4 +1,4 @@
> > -ccflags-y := -Werror
> > +ccflags-y := -Werror -Wno-unused-const-variable
> 
> JFYI, my gcc-4.3 does not like this switch.
> What's the minimum compiler version to build this code?

I build everything with gcc 4.4.4, so if it breaks with that I will notice.

Does it work if you wrap it in cc-option? eg:

ccflags-y := -Werror $(call cc-option,-Wno-unused-const-variable)

cheers